Shell size to 17 mm; shell very thin, almost globular. Sculpture of very fine spiral grooves. Color semi-transparent yellowish to whitish Compare with H. elegans (Gray, 1825), which is usually larger and has more well-defined spiral lines. Photos of live snails taken by Ángel Valdés in Sarasota Bay. Photo of stand-alone egg mass taken by Linda Shockley near Marco Island.